SAE J1255v001

SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefrom, is the sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions.QUESTIONS REGARDING THIS DOCUMENT: (724) 772-8512 FAX: (724) 776-0243TO PLACE A DOCUMENT ORDER; (724) 776-4970 FAX: (724) 776-0790SAE WEB ADDRESS http://www.sae.orgCopyright 1995 Society of Automotive Engineers, Inc.All rights reserved. Printed in U.S.A.SURFACEVEHICLE400 Commonwealth Drive, Warrendale, PA 15096-0001STANDARDSubmitted for recognition as an American National StandardJ1255REV.SEP95Issued 1979-01Revised J1995-09Superseding J1255 JAN85(R) SPECIFICATION DEFINITIONS—FELLER/BUNCHERForeword—This Document has also changed to comply with the new SAE Technical Standards Board format.1. Scope—This SAE Standard includes the definitions of specification terms most commonly used to describeboth wheeled and track type feller bunchers.1.1 Purpose—The purpose of this document is to provide a uniform method of defining specification terms forfeller bunchers.This document includes the definitions of specification terms peculiar to and most commonly used to describefeller bunchers. The specifications described must be qualified by stating the track shoe type and width or thetire size, ply rating and specified inflation pressure, and amount of counterweight or ballast with which themachine is equipped. For articulated machines, all specifications are with the axles parallel unless otherwisespecified. When specifications are affected by adjustable or extendable members, their position must bestated. All dimensions are for a machine on a level surface. The illustrations used are not intended to bedescriptive of any existing machine and are used here only to clarify the meaning of the document. Thedimensions indicated are basic and may be supplemented by the machine manufacturer.2. References2.1 Applicable Publications—The following publications form a part of this specification to the extent specifiedherein. Unless otherwise specified, the latest issue of SAE publications shall apply.2.1.1 SAE PUBLICATIONS—Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.SAE J1234—Specification Definitions—Off-Road Work MachinesSAE J1254—Component Nomenclature—Feller Buncher2.2 Related Publication—The following publication is provided for information purposes only and is not arequired part of this document.2.2.1 SAE PUBLICATION—Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.SAE J1209—Identification Terminology of Mobile Forestry MachinesSAE J1255 Revised SEP95-2-3. Definitions3.1 Right Hand and Left Hand—The operator s right-hand side or left-hand side, respectively, with the operatorfacing in the normal direction of travel and the machine in its primary functional mode.3.2 Front and Rear—The front or rear of the operator, respectively, when in the position described in 3.1.3.3 Felling Head Vertical (Tree) Centerline—The vertical centerline of the largest diameter tree the felling headis designed to cut.3.4 Horizontal Ground Plane—Flat, level surface.3.5 Levelling Mechanism—A mechanism or a linkage between the undercarriage and the upperstructure whosefunction is to maintain the upperstructure (in a horizontal plane) irrespective of the angle of the undercarriage(within the machine operating limits).4. Specification Definitions4.1 Operating Mass—As defined in SAE J1234.4.2 Overall Length (A)—The horizontal distance from a vertical plane touching the rearmost point of the machineto a vertical plane touching the forwardmost point of the felling head with the levelling mechanism (if equipped)parallel to the horizontal ground plane and the felling head positioned on the horizontal ground plane atmaximum reach. (Figure 1 and Figure 2)4.3 Overall Height (B)—The vertical distance between the horizontal ground plane and a horizontal plane passingthrough the highest point of the machine with the levelling table (if equipped) parallel to the horizontal groundplane and the felling head positioned as described in 4.2. (Figure 1 and Figure 2)4.4 Overall Width (C)—The distance between two vertical planes parallel to the machine s longitudinal axis andpassing through the farthest points on the two sides of this axis with the felling head positioned as described in4.2. (Figure 1 and Figure 2)4.5 Wheelbase or Length of Track on Ground (D)—As defined in SAE J1234. (Figure 1 and Figure 2)4.6 Track Gauge or Thread (E)—As defined in SAE J1234. If the front and the rear are different, both must bespecified. (Figure 1 and Figure 2)4.7 Ground Clearance (F)—As defined in SAE J1234. (Figure 1 and Figure 2)4.8 Upperstructure Tilt4.8.1 LONGITUDINAL TILT FORWARD AND REARWARD (GF AND GR)—The maximum angle in degrees that thelevelling mechanism is capable of levelling the upperstructure in forward and rearward direction. (Figure 1)4.8.2 SIDE TILT (HR AND HL)—The maximum angle in degrees that the levelling mechanism is capable of levellingthe upperstructure to the right and to the left in plane perpendicular to the longitudinal centerline of themachine. (Figure 1)4.9 Felling Head Tilt4.9.1 LONGITUDINAL FORWARD AND REARWARD TILT (I1 AND I2)—The maximum angle in degrees that the fellinghead vertical centerline tilts forward or rearward about the felling head pivot (see SAE J1254), with the fellinghead positioned as described in 4.2. (Figure 1 and Figure 2)SAE J1255 Revised SEP95-3-4.9.2 SIDE TILT ANGLE (JR AND JL)—The maximum angle in degrees that the felling head rotates to the right andto the left in a plane perpendicular to the longitudinal centerline of the machine with the booms and fellinghead positioned on or parallel to the longitudinal centerline. (Figure 1 and Figure 2)4.10 Cutting Distance (K,L,M,N)—The horizontal distance from the boom mast axis of rotation, the turn-table axisof rotation (see SAE J1254) or the front axle to the felling head vertical tree centerline when the verticalcenterline is perpendicular to the horizontal ground plane:(K) With the felling head on the horizontal ground plane and at its minimum distance from the machine.(Figure 1 and Figure 2)(L) With the felling head on the horizontal ground plane and at its maximum distance from the machine.(Figure 1 and Figure 2)(M) With the felling head at its maximum distance above the horizontal ground plane. (Figure 1 and Figure2)(N) With the felling head at its maximum distance below the horizontal ground plane. (Figure 1 and Figure2)4.11 Machine Cutting Depth (O)—The maximum vertical distance below the horizontal ground plane to ahorizontal plane through the bottom of the cutting edge when the vertical tree centerline of the felling head isperpendicular to the horizontal reference plane. (Figure 1 and Figure 2)4.12 Maximum Cutting Height (P)—The maximum vertical distance above the horizontal ground plane through thebottom of the cutting edge when the vertical tree centerline of the felling head is perpendicular to the horizontalground plane. (Figure 1 and Figure 2)4.13 Maximum Tree Diameter—The largest diameter tree that the machine is designed to fell in a single cut.4.14 Boom Swing (QR and QL)—The angle in degrees from the longitudinal axis of the machine to the longitudinalcenter of the boom at maximum right and left swing position. (Figure 1)4.15 Machine Clearance Circle (R)—As defined in SAE J1234 (Figure 2) with the following additional restrictions:a. Brakes cannot be usedb. Felling head to be at ground levelc. Articulated machines to be fully articulated4.16 Minimum Swing Circle (S)—The smallest diameter that the outermost point on the machine or felling headwill describe when the turntable and/or booms and felling head are swung to their limits. The felling head is tobe in the normal swing position and as close to the machine as possible without making contact with a non-rotating structural member. (Figure 1)4.17 Tail Swing Radius (T)—The maximum described radius from the centerline of rotation to the outermost pointof the upperstructure with the levelling table (if equipped) parallel to the horizontal ground plane. (Figure 1)4.18 Average Ground Pressure—The operating mass of the machine divided by the ground contact area asdefined in SAE J1234 expressed in kilopascals.4.19 Loaded Tire Radius (U)—The vertical distance from the horizontal center of the wheel to the horizontalground plane. (Figure 1)4.20 Minimum Stump Height (V)—The vertical distance from bottom of the felling head to the bottom of the treecutting edge. (Figure 1 and Figure 2)SAE J1255 Revised SEP95-4-5. Notes5.1 Marginal Indicia—The change bar (l) located in the left margin is for the convenience of the user in locatingareas where technical revisions have been made to the previous issue of the report. An (R) symbol to the leftof the document title indicates a complete revision of the report.FIGURE 1—FELLER BUNCHER—SWING TO BUNCH—TRACK TYPESAE J1255 Revised SEP95-5-FIGURE 2—FELLER BUNCHER—TRAVEL TO BUNCH—WHEEL TYPEPREPARED BY THE SAE OFF-ROAD MACHINERY TECHNICAL COMMITTEE SC28—FORESTRY AND LOGGING MACHINERYSAE J1255 Revised SEP95Rationale—In conjunction with the five-year review, this SAE document has been upgraded to SAE Standardfrom SAE Recommended Practice and formatted to comply with the SAE Technical Standards Boardformat. The SAE references cited in this document have been updated to be the most recent. Thespecification definitions were updated to include self levelling swing to tree feller bunchers.Relationship of SAE Standard to ISO Standard—Not applicable.Application—This SAE Standard includes the definitions of specification terms most commonly used todescribe both wheeled and track type feller bunchers.Reference SectionSAE J1209—Identification Terminology of Mobile Forestry MachinesSAE J1234—Specification Definitions—Off-Road Work MachinesSAE J1254—Component Nomenclature—Feller BuncherDeveloped by the SAE Off-Road Machinery Technical Committee SC28—Forestry and Logging MachinerySponsored by the SAE Off-Road Machinery Technical Committee